As it stands the next Supreme Court nominee, since the current one will not be considered, is likely to be (if Hillary is elected) a political choice rather than one that will interpret the original intent of the Founders and the Constitution. Many even feel that we, our nation, has outgrown the Constitution and that technological changes and societal changes warrant consideration of a new Constitution or scraping the one we have for a new one. I think that's dangerous thought and talk and a recipe for anarchy and civil conflict on a scale we haven't seen since the civil war.
That said I remember seeing the news where Hillary made the statement that Obama would be a good choice for the vacancy and she might consider that if she was President. That statement, to conservatives and Republicans is akin and very similar to say Trump saying if he's elected he would appoint Sarah Palin or Rush Limbaugh.
With our nation at the point it is and with such large potential changes looming for the Court the talk of the Anyone but Trump movement is disastrous. Ted Cruz would make a decent pick for the court but with the animosity and vulgar way he goes at Trump I doubt that Trump would ever consider him, much less appoint him. If Trump is the eventual nominee the Republican elite and establishment would be making a historically disastrous decision if they failed to get behind Trump and reconcile with his supporters. Handing the election and the Supreme Court vacancy appointment over to Hillary Clinton would certainly secure a liberal politically driven court for a generation to come and quite likely do away with the 2nd Amendment as well as many Religious liberties that the 1st Amendment guarantees unto us.
While no one knows who Trump would appoint or nominate I can guarantee you it would be someone far more acceptable than Hillary Clinton would nominate.